The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 5a938ed9481b0c06cb97aec45e722a80568256fd # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024120616-pucker-unlisted-7c65@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5a938ed9481b0c06cb97aec45e722a80568256fd Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I kishon@ti.com Date: Fri, 24 May 2024 16:27:13 +0530 Subject: [PATCH] PCI: keystone: Set mode as Root Complex for "ti,keystone-pcie" compatible MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

commit 23284ad677a9 ("PCI: keystone: Add support for PCIe EP in AM654x Platforms") introduced configuring "enum dw_pcie_device_mode" as part of device data ("struct ks_pcie_of_data"). However it failed to set the mode for "ti,keystone-pcie" compatible.

Since the mode defaults to "DW_PCIE_UNKNOWN_TYPE", the following error message is displayed for the v3.65a controller:

"INVALID device type 0"

Despite the driver probing successfully, the controller may not be functional in the Root Complex mode of operation.

So, set the mode as Root Complex for "ti,keystone-pcie" compatible to fix this.

Fixes: 23284ad677a9 ("PCI: keystone: Add support for PCIe EP in AM654x Platforms") Link: https://lore.kernel.org/r/20240524105714.191642-2-s-vadapalli@ti.com Signed-off-by: Kishon Vijay Abraham I kishon@ti.com Signed-off-by: Siddharth Vadapalli s-vadapalli@ti.com [kwilczynski: commit log, added tag for stable releases] Signed-off-by: Krzysztof Wilczyński kwilczynski@kernel.org Cc: stable@vger.kernel.org

diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c index 2219b1a866fa..b99bc4071fe9 100644 --- a/drivers/pci/controller/dwc/pci-keystone.c +++ b/drivers/pci/controller/dwc/pci-keystone.c @@ -1093,6 +1093,7 @@ static int ks_pcie_am654_set_mode(struct device *dev,

static const struct ks_pcie_of_data ks_pcie_rc_of_data = { .host_ops = &ks_pcie_host_ops, + .mode = DW_PCIE_RC_TYPE, .version = DW_PCIE_VER_365A, };